Clarify the talk voting access selection.
Clarify the talk voting access selection.

See #138.

artcz/epcon,matrixise/epcon,malemburg/epcon,malemburg/epcon,EuroPython/epcon,barrachri/epcon,matrixise/epcon,PythonSanSebastian/epcon,artcz/epcon,artcz/epcon,PythonSanSebastian/epcon,barrachri/epcon,EuroPython/epcon,matrixise/epcon,artcz/epcon,barrachri/epcon,matrixise/epcon,matrixise/epcon,artcz/epcon,barrachri/epcon,PythonSanSebastian/epcon,EuroPython/epcon,EuroPython/epcon,artcz/epcon,malemburg/epcon,malemburg/epcon,malemburg/epcon,PythonSanSebastian/epcon,barrachri/epcon,barrachri/epcon,PythonSanSebastian/epcon,matrixise/epcon,PythonSanSebastian/epcon,malemburg/epcon